Question

Which of the following measuring technique is utilized for measuring nitrogen?

(a) By using a method based on gas density

(b) By using paramagnetic analyzers

(c) By using magnetic wind instruments

(d) By using a photospectrometer where a gas sample is analysed and detected with a photocell

This question was addressed to me in unit test.

Asked question is from Method Based on Ionization of Gases topic in portion Industrial Gas Analysers of Analytical Instrumentation

Answer 1

Right choice is (d) By using a photospectrometer where a gas sample is analysed and detected with a photocell

To explain: By using a photospectrometer gas sample is analysed, for measuring nitrogen. It is then selectively filtered by using a photocell which provides an appropriate electric signal.